Lee, Yong-Bok Park, Dong-Jin Kim, Chang-Ho Ryu, Keun 2024-01-21T01:33:59Z 2024-01-21T01:33:59Z 2021-09-04 2007-02 0960-1317 https://pubs.kist.re.kr/handle/201004/134707 The rotordynamic characteristics of a micro power system supported by air foil bearings were investigated. Stability analysis was performed by a finite element method with the predicted dynamic coefficients of the foil bearings. A preliminary test rig was developed to simulate the operating characteristics of the micro power system. It consisted of a rotor supported by two air foil journal bearings and two air foil thrust bearings, and an impulse driven turbine. The foil journal bearings had a diameter of 7 mm and a length of 7 mm (L/D = 1). The test rig was operated stably under various situations and speeded up to 300 000 rpm. The main portion of the rotor response was synchronous and the amplitude of synchronous vibration was about 5 - 20 mu m. Further, theoretical and experimental results for the unbalance response were compared. From this study, we showed the possibility of stable performance for the micro power system supported by air foil bearings. English IOP PUBLISHING LTD JOURNAL BEARINGS SLIP-FLOW GAS Rotordynamic characteristics of a micro turbo generator supported by air foil bearings Article 10.1088/0960-1317/17/2/016 1 JOURNAL OF MICROMECHANICS AND MICROENGINEERING, v.17, no.2, pp.297 - 303 JOURNAL OF MICROMECHANICS AND MICROENGINEERING 17 2 297 303 scie scopus 000243724100016 2-s2.0-34249076074 Engineering, Electrical & Electronic Nanoscience & Nanotechnology Instruments & Instrumentation Physics, Applied Engineering Science & Technology - Other Topics Instruments & Instrumentation Physics Article JOURNAL BEARINGS SLIP-FLOW GAS Bearings Generator Rotordynamics